UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of ~~JANUARY~~February 2026

Commission File Number: 001-41889

CADELER A/S

(Translation of registrant's name into English)

Kalvebod Brygge 43

DK-1560 Copenhagen V, Denmark

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F ¨

~~Press~~Stock ~~Release~~Exchange Announcement

~~Cadeler signs~~CADELER A/S: REPORTING ON TRANSACTIONS IN CADELER A/S SHARES BY ~~preferred~~PERSONS ~~supplier~~DISCHARGING ~~agreement~~MANAGERIAL ~~for foundation installation~~RESPONSIBILITIES inAND ~~2028~~PERSONS CLOSELY ASSOCIATED WITH THEM

Copenhagen, ~~28 January~~ 3 February 2026 – : Cadeler ~~today announces~~ ~~that~~A/S it (“Cadeler”) has received ~~signed~~notification apursuant ~~preferred~~to ~~supplier~~article ~~agreement~~19 of the Market Abuse Regulation (~~PSA~~EU) ~~with~~no. an596/2014 ~~undisclosed~~of ~~client~~the ~~for~~below ~~the~~transaction ~~transportation~~related ~~and~~to ~~installation~~shares ~~(T&I)~~in ~~of monopiles and~~Cadeler ~~transition~~made ~~pieces~~by atpersons adischarging ~~large offshore~~managerial ~~wind~~responsibilities ~~farm located~~ in ~~European~~Cadeler ~~waters~~and/or persons closely associated with them.

~~The~~Scorpio ~~installation~~Holdings ~~campaign~~Limited isand ~~expected~~Scorpio ~~to commence in the first~~Services ~~half~~Holding ~~of 2028~~Limited, ~~and~~both persons toclosely beassociated ~~executed~~with ~~using two~~Emanuele ~~of Cadeler’s wind installation vessels~~Lauro, ~~including~~Vice-Chairman ~~one~~ of the ~~company’s~~ ~~newbuild~~Board, ~~A-class series~~made ~~which~~the ~~are designed~~transaction todescribed ~~excel~~ in ~~XXL~~the ~~foundation~~attached ~~installation. The PSA is subject~~notifications toon the ~~client’s~~date ~~final~~set ~~investment~~out ~~decision on the project~~therein.

~~The~~Please ~~agreement~~see ~~demonstrates~~ the ~~company’s~~attached ~~continued~~files ~~development as~~for afurther ~~full-scope provider of foundation transportation and installation services within offshore wind~~details. ~~This will be Cadeler’s first full-scope foundation T&I project outside the United Kingdom.~~

Mikkel Gleerup, CEO of Cadeler, comments: “The signing of this preferred supplier agreement reflects continued confidence in Cadeler’s capabilities within offshore wind foundation transportation and installation. As we continue to build our pipeline of complex foundation scopes and broaden our experience in T&I across jurisdictions, our focus remains on safe execution and reliable project delivery.”

***

For further information, please contact:

Cadeler Press Office:

press@cadeler.com

Mikkel Gleerup

CEO, Cadeler

+45 3246 3102

mikkel.gleerup@cadeler.com

Alexander Simmonds

EVP & CLO, Cadeler

+44 7376 174172

~~alexander~~Alexander.simmonds@cadeler.com

2About Cadeler A/S:

~~About~~Cadeler is a global leader in offshore wind installation, operations, and maintenance services. Cadeler is a pure play company, operating solely in the offshore wind industry with an uncompromising focus on safety and the environment. Cadeler owns and operates the industry’s largest fleet of jack-up offshore wind installation vessels and has for more than 10 years been a key supplier in the development of offshore wind energy to power millions of households. Cadeler’s fleet, expertise and capacity to handle the largest and most complex next-generation offshore wind installation projects positions the company to deliver exceptional services to the industry. Cadeler is committed to being at the forefront of sustainable wind farm installation and to enabling the global energy transition towards a future built on renewable energy. Cadeler is listed on the New York Stock Exchange (ticker: CDLR) and the Oslo Stock Exchange (ticker: CADLR).

Cadeler A/S (Cadeler) is a global leader in offshore wind installation, operations, and maintenance services. Cadeler is a pure play company, operating solely in the offshore wind industry with an uncompromising focus on safety and the environment. Cadeler owns and operates the industry’s largest fleet of jack-up offshore wind installation vessels and has for more than 10 years been a key supplier in the development of offshore wind energy to power millions of households. Cadeler’s fleet, expertise and capacity to handle the largest and most complex next-generation offshore wind installation projects positions the company to deliver exceptional services to the industry. Cadeler is committed to being at the forefront of sustainable wind farm installation and to enabling the global energy transition towards a future built on renewable energy. Cadeler is listed on the New York Stock Exchange (ticker: CDLR) and the Oslo Stock Exchange (ticker: CADLR). For more information, please visit www.cadeler.com.

3Reporting of transactions made by persons discharging managerial responsibilities and persons closely associated with them in Cadeler A/S’ shares

1	Details of the Reporting Person and their Closely Associated Persons
a)	Name	Scorpio Services Holding Limited
2	Reason for the notification
a)	Position/status	Closely associated person to Emanuele Lauro, Vice-Chairman of the Board of Directors
b)	Initial notification /Amendment	Initial notification
3	Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a)	Name	Cadeler A/S
b)	LEI	9845008439EUED140282
4	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument and identification code	Shares ISIN DK0061412772
b)	Nature of the transaction	Sale of shares


c)	Price(s) and volume(s)	Price(s)	Volume(s)
		USD 5.98	666,065

Aggregated information

-      Aggregated volume
-      Price

Average price per share: USD 5.98
Total number of shares: 666,065
Total price: USD 3,981,403.63

Date of the transaction

28 January 2026

Place of the transaction

Outside a trading venue

1	Details of the Reporting Person and their Closely Associated Persons
a)	Name	Scorpio Holdings Limited
2	Reason for the notification
a)	Position/status	Closely associated person to Emanuele Lauro, Vice-Chairman of the Board of Directors
b)	Initial notification /Amendment	Initial notification
3	Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a)	Name	Cadeler A/S
b)	LEI	9845008439EUED140282
4	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument and identification code	Shares ISIN DK0061412772
b)	Nature of the transaction	Purchase of shares


c)	Price(s) and volume(s)	Price(s)	Volume(s)
		USD 5.98	666,065

Aggregated information

-     Aggregated volume
-     Price

Average price per share: USD 5.98
Total number of shares: 666,065
Total price: USD 3,981,403.63

Date of the transaction

28 January 2026

Place of the transaction

Outside a trading venue

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: 28 January 2026	CADELER A/S
Date: February 3, 2026	CADELER A/S
	(Registrant)
	By:	/s/ Mikkel Gleerup
	Name:	Mikkel Gleerup
	Title:	Chief Executive Officer

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